I've been coming here on and off for the past 5 years and have found a decline in the food quality and volume of customers. We just went last night, and for a Saturday the restaurant was at 1/5th of their capacity. The food -- both sushi/sashimi and cooked meals -- were not as fresh as they used to be... misoyaki chicken wasn't that fresh and my wife said the same about the fish... although the prices have either gone up or stayed the same, which is higher than the normal sushi joint.
I don't know if the management/ownership has changed or simply the volume is lacking and because of this the quality has gone down...but, this restaurant is no longer the same Ginko Restaurant that I would recommend to friends and colleagues as my go to authentic sushi joint near the airport.